Chapter 5.1: Media Storage - CCTV Technology Fundamentals
Posted by Arowosegbe Olawale in General
Many businesses rely on WORM (write-once, read-many) media for their long-term storage needs because of the reliability and low cost it provides. CDs and DVDs are examples of modern WORM technology, while magnetic discs and tape were used in previous generations of the technology. WORM storage media has the potential downside of being difficult to manage your records on. Data stored on servers is more secure than, say, a CD, which can be lost, stolen, or physically removed from its environment. However, there is another issue with WORM media: storage space. Transferring all the video information needed for safekeeping could take a long time.
Alternatively, video footage can be stored in one convenient location, searched and retrieved, and viewed by authorized personnel with the help of a secure server equipped with enough disc space. In a redundant array of independent discs (RAID), servers allow for data to be moved without any disruption to service. To prevent data loss in the event of a hard drive failure, RAID storage allows for the distribution of images across multiple drives. If data integrity is suspected to have been compromised, RAID systems check for it and repair it using the parity disc. If your WORM device is broken, you will likely never be able to access your data again.